So lets say a 109E with drop-tanks and a two-stage supercharged DB601 going into the Battle-of-Britain, and you`re looking at a different outcome, although you have tactical considerations too, and the twit Goring and his crew of numpty yes-men could have chucked it all away with any set of aircraft at his disposal, but a 109 thus equipped was a pretty serious practical possibility and is less far fetched than the jet scenario.
Not just the less than stellar Lw leadership, there is still that stretch of dark blue-green stuff that had to be crossed if Britain was to be knocked out.